dts: st: stm32wb0: add RTC node

Add RTC device node to STM32WB0 series DTSI.

Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>

Author: mathieuchopstm

dts/arm/st/wb0/stm32wb0.dtsi

@@ -178,6 +178,14 @@
 			};
 		};
 
+		rtc: rtc@40004000 {
+			compatible = "st,stm32-rtc";
+			reg = <0x40004000 DT_SIZE_K(1)>;
+			interrupts = <11 0>;
+			clocks = <&rcc STM32_CLOCK(APB0, 12)>;
+			status = "disabled";
+		};
+
 		usart1: serial@41004000 {
 			compatible = "st,stm32-usart", "st,stm32-uart";
 			reg = <0x41004000 DT_SIZE_K(1)>;